JPH0329628B2 - - Google Patents
Info
- Publication number
- JPH0329628B2 JPH0329628B2 JP55096967A JP9696780A JPH0329628B2 JP H0329628 B2 JPH0329628 B2 JP H0329628B2 JP 55096967 A JP55096967 A JP 55096967A JP 9696780 A JP9696780 A JP 9696780A JP H0329628 B2 JPH0329628 B2 JP H0329628B2
- Authority
- JP
- Japan
- Prior art keywords
- oil pump
- steering
- vehicle speed
- oil
- load current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 23
- 238000010586 diagram Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/065—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by specially adapted means for varying pressurised fluid supply based on need, e.g. on-demand, variable assist
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D6/00—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
- B62D6/02—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to vehicle speed
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Steering Mechanism (AREA)
- Steering Control In Accordance With Driving Conditions (AREA)
Description
【発明の詳細な説明】
〔発明の詳細な説明〕
この発明はパワーステアリング装置の改良に関
する。DETAILED DESCRIPTION OF THE INVENTION [Detailed Description of the Invention] This invention relates to improvements in power steering devices.
一般に、パワーステアリング装置において、低
速走行時にステアリングホイールを捕助する動力
流体の供給を増大してステアリングホイールを軽
くし、高速走行時には動力流体の供給を減少して
ステアリングホイールを重くして安定させること
が望ましい。 Generally, in a power steering device, when driving at low speeds, the supply of power fluid that assists the steering wheel is increased to make the steering wheel lighter, and when driving at high speeds, the supply of power fluid is decreased to make the steering wheel heavier and more stable. is desirable.
従来の装置では、このような目的のため走行車
速に伴なう操舵力をシリンダに供給できるよう車
速センサを用いて油圧反動制御を行なつたり、オ
イルポンプ又はサーボ弁でバイパスリターン制御
を行なつていた。しかしながら、このような従来
装置ではオイルポンプからの吐出流体の利用度が
高速走行において全く悪く、且つエネルギ節約時
代に沿わない欠点があつた。本発明者は先に特願
昭54−155270号によつて上記の如き従来装置の欠
点を改善するようにしたパワーステアリング方法
および装置を提供した。 For this purpose, conventional devices use a vehicle speed sensor to perform hydraulic reaction control so that the steering force corresponding to the traveling vehicle speed can be supplied to the cylinder, or perform bypass return control using an oil pump or servo valve. was. However, such conventional devices have the disadvantage that the efficiency of utilizing the fluid discharged from the oil pump is quite poor during high-speed running, and that they are not in keeping with the energy saving era. The present inventor previously provided a power steering method and device in Japanese Patent Application No. Sho 54-155270 which improves the drawbacks of the conventional device as described above.
本発明はこの先願発明において用いられている
ステアリングホイールの回転動作を検出するセン
サを不要ならしめるようにしたものである。即
ち、ステアリングホイールの動きをセンサによつ
て検出する代りにモータの操舵負荷電流により上
記ホイールの動作を感知するようにしたものであ
る。 The present invention eliminates the need for a sensor for detecting the rotational movement of the steering wheel, which is used in the prior invention. That is, instead of detecting the movement of the steering wheel by a sensor, the movement of the wheel is sensed by the steering load current of the motor.
以下、本発明の実施例を図面を参照して詳細に
説明する。第1図において符号1はステアリング
ホイール(ハンドル)を示し、このホイールの下
方にはコントロールバルブ、即ちサーボ弁2が配
置されている。このサーボ弁はホイールの下端に
設けられたピニオンギヤ3を含むギヤ装置(図示
せず)により作動せしめられる。このサーボ弁に
はオイルポンプ4が接続され、又図示しないパワ
ーシリンダがラインA,Bを介して接続されてい
る。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 1 indicates a steering wheel, and a control valve, ie, a servo valve 2, is arranged below this wheel. This servo valve is actuated by a gear system (not shown) including a pinion gear 3 provided at the lower end of the wheel. An oil pump 4 is connected to this servo valve, and a power cylinder (not shown) is connected via lines A and B.
オイルポンプ4を制御する本発明のコントロー
ラ10は、オイルポンプ4を駆動する駆動体、例
えばモータ11を制御する制御回路12とこの制
御回路に接続された車速検出手段13と後述する
操舵負荷電流検出手段16とから成る。車速検出
手段13は車速回転入力Dに接続された伝達ケー
ブル14とこのケーブルに連結された車速センサ
15とを備える。車速回転入力Dからの車輌速度
は、伝達ケーブル14を介して車速センサ15で
検出され、このセンサによつて第2図に示す如く
車速アナログ電圧E1が発電される。この電圧は
制御回路12に送られる。制御回路は電圧が高く
なるにつれて、従つて車速が増大するにつれてモ
ータ11の回転速度を減少させるようモータを制
御する。この結果、オイルポンプ4の回転量は車
速の増加に応じて減少することになる。このこと
は高速になるにつれてパワーシリンダへのオイル
量が減少することになり従つて、高速になるつれ
てステアリングホイールの回転は重くなることに
なる。逆に低速の場合は高速に比しオイルポンプ
4の回転量が多いためパワーシリンダへ供給され
るオイル量が多くなりステアリングホイールの回
転は軽くなる。制御回路12がモータ11の速度
を制御する例として例えば車速センサ15として
発電機を用い、制御回路として半導体回路レギユ
レータを用いて発電機の発電電圧でレギユレータ
を制御してモータ11の回転数を制御することが
できる。又、別の実施例では、センサを設けるこ
となくデイジタルで車速を計時し、これに応じて
モータの回転を制御することもできる。 A controller 10 of the present invention that controls the oil pump 4 includes a control circuit 12 that controls a drive body that drives the oil pump 4, such as a motor 11, a vehicle speed detection means 13 connected to this control circuit, and a steering load current detection unit that will be described later. means 16. The vehicle speed detection means 13 includes a transmission cable 14 connected to the vehicle speed rotation input D and a vehicle speed sensor 15 connected to this cable. The vehicle speed from the vehicle speed rotation input D is detected by a vehicle speed sensor 15 via a transmission cable 14, and this sensor generates a vehicle speed analog voltage E1 as shown in FIG. This voltage is sent to control circuit 12. The control circuit controls the motor to reduce the rotational speed of the motor 11 as the voltage increases and thus as the vehicle speed increases. As a result, the amount of rotation of the oil pump 4 decreases as the vehicle speed increases. This means that as the speed increases, the amount of oil in the power cylinder decreases, and therefore, as the speed increases, the rotation of the steering wheel becomes heavier. Conversely, at low speeds, the amount of rotation of the oil pump 4 is greater than at high speeds, so the amount of oil supplied to the power cylinder increases and the rotation of the steering wheel becomes lighter. As an example of the control circuit 12 controlling the speed of the motor 11, for example, a generator is used as the vehicle speed sensor 15, a semiconductor circuit regulator is used as the control circuit, the regulator is controlled by the generated voltage of the generator, and the rotation speed of the motor 11 is controlled. can do. In another embodiment, the vehicle speed can be measured digitally without providing a sensor, and the rotation of the motor can be controlled accordingly.
本発明では、上記コントローラにはステアリン
グを行なうとき即ちハンドルが回転した時モータ
11の操舵負荷電流を検出し、この検出された電
流によつて上記オイルポンプの制御を開始する操
舵負荷電流検出手段16が設けられている。この
検出手段16は一般に知られている主電流回路の
電圧降下の検出回路を、モータ11と制御回路1
2との間に挿入し、モータ11に流れる操舵負荷
電流を演算して取り出す電子回路から成る。この
検出手段16からの操舵検出信号は、車速センサ
15からの制御回路12に入る入力を制御するゲ
ート信号の役目をする。更に詳細にのべると、制
御回路12は通常の構成を有する。この制御回路
は、例えば、操舵負荷電流検出手段16に接続さ
れた積分・増幅器と、この積分・増幅器に接続さ
れたOFFデイレータイマと、このOFFデイレー
タイマに接続された比較回路と、この比較回路に
夫々接続されたPWM増幅器および三角波発振器
とから成る。PWM増幅器はモータ11に接続さ
れ、比較回路は車速センサ15に接続されてい
る。 In the present invention, the controller includes a steering load current detection means 16 that detects the steering load current of the motor 11 when steering is performed, that is, when the steering wheel rotates, and starts controlling the oil pump based on the detected current. is provided. This detection means 16 is a commonly known main current circuit voltage drop detection circuit that connects the motor 11 and the control circuit 1.
It consists of an electronic circuit that is inserted between the motor 11 and the motor 11 and calculates and extracts the steering load current flowing through the motor 11. The steering detection signal from the detection means 16 serves as a gate signal for controlling the input from the vehicle speed sensor 15 to the control circuit 12 . More specifically, the control circuit 12 has a conventional configuration. This control circuit includes, for example, an integrator/amplifier connected to the steering load current detecting means 16, an OFF delay timer connected to this integrator/amplifier, a comparison circuit connected to this OFF delay timer, and a comparison circuit respectively. It consists of a connected PWM amplifier and a triangular wave oscillator. The PWM amplifier is connected to the motor 11 and the comparison circuit is connected to the vehicle speed sensor 15.
ステアリングホイールを回すと、コントロール
バルブにおけるオイルポンプ4からこのコントロ
ールへ流入する油路がパワーシリンダへ開路して
加圧状態になり、モータ11に操舵負荷電流が流
れる。この負荷電流は、操舵負荷電流検出手段1
6によつて検出され、この検出信号は積分・増幅
器によつて平滑増幅されて比較回路を作動させる
ゲート信号となる。 When the steering wheel is turned, the oil path flowing from the oil pump 4 to the control valve opens to the power cylinder and becomes pressurized, and a steering load current flows to the motor 11. This load current is detected by the steering load current detection means 1
6, and this detection signal is smoothed and amplified by an integrator/amplifier and becomes a gate signal for operating a comparison circuit.
一方、車速センサ15からの信号と三角波発振
器の出力電圧とが比較回路に入力され、ここでパ
ルス幅変調信号(PWMパルス)を発生し、これ
がPWM増幅器に入力され、このPWM増幅器の
出力でモータ11が回転される。 On the other hand, the signal from the vehicle speed sensor 15 and the output voltage of the triangular wave oscillator are input to a comparator circuit, which generates a pulse width modulation signal (PWM pulse), which is input to a PWM amplifier, and the output of this PWM amplifier is used to control the motor. 11 is rotated.
上記において、操舵負荷電流検出手段からの信
号は、積分・増幅器で操舵の有無(ON−OFF)
の信号に整形される。この整形された信号は
OFFデイレータイマによつて引伸ばされる。こ
の目的は、走行中の安定操舵を得るために、ステ
アリングホイールの回転を止めてもしばらく第3
図に示すP1の低速回転エリアに移行しないよう
に操舵負荷電流検出信号系に保持時限の機能をも
たせるためである。従つて、引伸ばされた信号に
よつて第3図のカーブPの車速感応回転領域が持
続される。 In the above, the signal from the steering load current detection means is used as an integrator/amplifier to determine whether or not there is steering (ON-OFF).
The signal is formatted as follows. This shaped signal is
Extended by the OFF delay timer. The purpose of this is to provide stable steering while driving, so even if the steering wheel stops rotating, the third
This is to provide the steering load current detection signal system with a holding time limit function so as not to shift to the low speed rotation area of P1 shown in the figure. Therefore, the vehicle speed sensitive rotation region of curve P in FIG. 3 is maintained by the expanded signal.
車速の上昇に応じる車速センサ15からの信号
は比較回路において三角波発振器の出力信号と比
較され、この比較信号によつてPWM増幅器をド
ライブし、この電力増幅されたPWM出力信号で
モータ11を回転させる。 The signal from the vehicle speed sensor 15 in response to the increase in vehicle speed is compared with the output signal of the triangular wave oscillator in a comparator circuit, the PWM amplifier is driven by this comparison signal, and the motor 11 is rotated by this power-amplified PWM output signal. .
このように、本発明ではステアリングホイール
の回転をモータ11の操舵負荷電流として検出
し、又、車速を車速センサによつて検出し、両者
を制御回路に入力してモータ11の回転を第3図
に示す如く制御するようにしたものである。即
ち、第3図は第1図の実施例における車速に対す
るオイルポンプの回転特性を示したもので、ステ
アリングホイールを回さない時にはオイルポンプ
が例えば60Km/時の車速まで常時極めて低速で回
転しこれを越えると無駄な流通エネルギを使わな
いように常時極めて低速P1又は停止P0状態にモ
ータ11を保持させておき、ステアリングホイー
ルを回した時またはその回転完了後、一定時間そ
の時の走行速度に伴ないカーブPに沿つたPレベ
ルの制御回路でモータを回転させ、出力ライン
A,Bを介してパワーシリンダに流体を圧送し、
ステアリングホイールの回転出力を補助する。こ
の場合、操舵負荷電流検出手段16に例えば時定
数回路などの時限手段を設けると、ハンドル回転
時間t1後、例えばt2だけポンプ作動停止の遅延時
間が上記時限手段によつて付加され、このため、
高速道路などの長いカーブでハンドルを回し続け
る間、自動的にオイルポンプが持続動作しステア
リングホイールに対する回転出力が補給される。 As described above, in the present invention, the rotation of the steering wheel is detected as the steering load current of the motor 11, and the vehicle speed is detected by the vehicle speed sensor, and both are input to the control circuit to control the rotation of the motor 11 as shown in FIG. The control is as shown in FIG. In other words, Fig. 3 shows the rotational characteristics of the oil pump with respect to the vehicle speed in the embodiment shown in Fig. 1. When the steering wheel is not turned, the oil pump always rotates at an extremely low speed up to a vehicle speed of, for example, 60 km/h. In order to avoid wasting circulation energy if the steering wheel exceeds 100 kW, the motor 11 is kept at an extremely low speed P 1 or stopped P 0 at all times, and when the steering wheel is turned or after the rotation is completed, the motor 11 is kept at the current traveling speed for a certain period of time. The motor is rotated by a P-level control circuit along a corresponding curve P, and fluid is pumped to the power cylinder via output lines A and B.
Assists the rotation output of the steering wheel. In this case, if the steering load current detection means 16 is provided with a time limit means such as a time constant circuit, the time limit means adds a delay time for stopping the pump operation by, for example, t 2 after the steering wheel rotation time t 1 . For,
As you continue to turn the steering wheel on long curves such as on highways, the oil pump automatically operates continuously to supply rotational output to the steering wheel.
上述したように本発明によれば、走行速度ある
いはエンジン回転に関連しないでバツテリーによ
りモータを高速回転させることによりオイルポン
プの回転数を高め吐出量を増加し得るため、オイ
ルポンプの寸法を従来の数分の1以下に小さくし
ても、パワーシリンダが要求するステアリング時
の容量出力を充分に満すことができることから、
オイルポンプを小型軽量化することができる。又
ステアリングホイールを操作しない時はポンプが
常時低速または、停止状態で駆動制御されるので
エネルギを節減し又オイルポンプモータのブラシ
の消耗を減らし寿命を延長することができる等の
実益がある。乗用車による燃費テストでは、本発
明による操舵負荷電流検出方式による油圧式パワ
ーステアリングは従来のエンジン駆動方式に比べ
て、高速道路走行時および一般市道走行時ともに
4パーセント以上3の費改善を果たすことが判明
した。 As described above, according to the present invention, by rotating the motor at high speed with the battery regardless of the traveling speed or engine rotation, the rotation speed of the oil pump can be increased and the discharge amount can be increased. Even if it is smaller than a fraction of the size, it can sufficiently satisfy the capacity output required by the power cylinder during steering.
The oil pump can be made smaller and lighter. In addition, when the steering wheel is not operated, the pump is always driven at a low speed or in a stopped state, which has practical benefits such as saving energy and reducing wear and tear on the brushes of the oil pump motor, thereby extending the life of the oil pump motor. In a fuel efficiency test using a passenger car, the hydraulic power steering system using the steering load current detection method according to the present invention achieved a cost improvement of more than 4% compared to the conventional engine drive system, both when driving on expressways and on city roads. There was found.
第1図は本発明を実施したパワーステアリング
装置の一実施例を示す概略構成図、第2図は車速
度検出装置の出力電圧を示す曲線図、第3図は本
発明のステアリング装置によつて制御されたオイ
ルポンプ用モータの回転特性を示す曲線図であ
る。
1……ステアリングホイール、2……コントロ
ールバルブ、4……オイルポンプ、10……コン
トローラ、11……モータ、12……制御回路、
13……車速検出手段、15……車速検出セン
サ、16……操舵負荷電流検出手段。
FIG. 1 is a schematic configuration diagram showing an embodiment of a power steering device embodying the present invention, FIG. 2 is a curve diagram showing the output voltage of a vehicle speed detection device, and FIG. 3 is a diagram showing an example of a power steering device according to the present invention. FIG. 3 is a curve diagram showing the rotational characteristics of a controlled oil pump motor. DESCRIPTION OF SYMBOLS 1... Steering wheel, 2... Control valve, 4... Oil pump, 10... Controller, 11... Motor, 12... Control circuit,
13...Vehicle speed detection means, 15...Vehicle speed detection sensor, 16...Steering load current detection means.
Claims (1)
油を供給するオイルポンプと、該オイルポンプを
駆動するモータと、ステアリングホイールに接続
され前記オイルポンプからパワーシリンダへの圧
力油の供給を制御するコントロールバルブとを備
えるパワーステアリング装置において、前記オイ
ルポンプに接続され車速の増加に従つてオイルポ
ンプの回転量を減少させるようにオイルポンプを
制御するコントローラを具備し、該コントローラ
は、前記ステアリングホイールを回したときオイ
ルポンプの圧力に感応する前記モータの操舵負荷
電流を検出する操舵負荷電流検出手段を有し、該
操舵負荷電流検出手段による電流検出によつて、
前記オイルポンプの制御が開始されるようにした
ことを特徴とするパワーステアリング装置。 2 パワーシリンダと、該パワーシリンダに圧力
油を供給するオイルポンプと、該オイルポンプか
らパワーシリンダへの圧力油の供給を制御するコ
ントロールバルブと、前記オイルポンプに接続さ
れ車速の増加に従つてオイルポンプの回転量を減
少させるようにオイルポンプを制御するコントロ
ーラと、ステアリングホイールを回転したときの
操舵負荷電流を検出する操舵負荷電流検出手段と
を備えてなり、前記オイルボンプは所定の車速ま
では常時極めて低速で回転し該所定の車速を越え
ると常時極めて低速で回転もしくは停止していて
前記ステアリングホイールの回転時もしくはこの
回転後一定時間前記オイルポンプの回転量が増加
して必要な油量を供給し、この必要な油量が車速
の増加に伴つて減少されるようにしたことを特徴
とするパワーステアリング装置。 3 前記操舵負荷電流検出手段は前記ステアリン
グホイールの回転後一定時間のみ前記オイルポン
プの回転量を増加せしめる時限回路手段を含んで
なる請求の範囲第2項記載のパワーステアリング
装置。[Claims] 1. A power cylinder, an oil pump that supplies pressure oil to the power cylinder, a motor that drives the oil pump, and a motor that is connected to a steering wheel and supplies pressure oil from the oil pump to the power cylinder. The power steering apparatus includes a controller connected to the oil pump and controlling the oil pump so as to reduce the amount of rotation of the oil pump as the vehicle speed increases, and the controller includes a control valve that controls the oil pump. It has a steering load current detection means for detecting a steering load current of the motor that is sensitive to the pressure of the oil pump when the steering wheel is turned, and by the current detection by the steering load current detection means,
A power steering device characterized in that control of the oil pump is started. 2. A power cylinder, an oil pump that supplies pressure oil to the power cylinder, a control valve that controls the supply of pressure oil from the oil pump to the power cylinder, and a control valve that is connected to the oil pump and controls the oil pump as the vehicle speed increases. The oil pump is equipped with a controller that controls the oil pump to reduce the amount of rotation of the pump, and a steering load current detection means that detects the steering load current when the steering wheel is rotated, and the oil pump is constantly operated up to a predetermined vehicle speed. The oil pump rotates at an extremely low speed, and when it exceeds the predetermined vehicle speed, it always rotates at an extremely low speed or stops, and the rotation amount of the oil pump increases when the steering wheel rotates or for a certain period of time after this rotation to supply the required amount of oil. A power steering device characterized in that the required amount of oil is reduced as the vehicle speed increases. 3. The power steering device according to claim 2, wherein the steering load current detection means includes a time limit circuit means for increasing the rotation amount of the oil pump only for a certain period of time after the rotation of the steering wheel.
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9696780A JPS5722967A (en) | 1980-07-16 | 1980-07-16 | Power steering system |
US06/221,612 US4392540A (en) | 1980-07-16 | 1980-12-31 | Power steering device for a vehicle |
DE19813100067 DE3100067A1 (en) | 1980-07-16 | 1981-01-03 | POWER STEERING DEVICE FOR A VEHICLE |
AU65981/81A AU547767B2 (en) | 1980-07-16 | 1981-01-05 | Power steering device |
GB8100382A GB2079691B (en) | 1980-07-16 | 1981-01-07 | Power steering device for a vehicle |
KR1019810000036A KR870001172B1 (en) | 1980-07-16 | 1981-01-08 | Power handle driving instrument |
CA000368226A CA1169782A (en) | 1980-07-16 | 1981-01-09 | Power steering device for a vehicle |
FR8100326A FR2486898B1 (en) | 1980-07-16 | 1981-01-09 | POWER STEERING DEVICE FOR VEHICLE |
IT67020/81A IT1172218B (en) | 1980-07-16 | 1981-01-09 | MOTOR STEERING DEVICE FOR A VEHICLE |
BE0/203457A BE887036A (en) | 1980-07-16 | 1981-01-09 | VEHICLE SERVO DIRECTION |
ES498431A ES498431A0 (en) | 1980-07-16 | 1981-01-09 | ASSISTED STEERING DEVICE. |
NL8100076A NL8100076A (en) | 1980-07-16 | 1981-01-09 | POWER STEERING DEVICE FOR A VEHICLE. |
US06/284,539 US4417640A (en) | 1980-07-16 | 1981-07-20 | Electrically driven oil pressured power steering apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9696780A JPS5722967A (en) | 1980-07-16 | 1980-07-16 | Power steering system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5722967A JPS5722967A (en) | 1982-02-06 |
JPH0329628B2 true JPH0329628B2 (en) | 1991-04-24 |
Family
ID=14178995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9696780A Granted JPS5722967A (en) | 1980-07-16 | 1980-07-16 | Power steering system |
Country Status (12)
Country | Link |
---|---|
US (1) | US4392540A (en) |
JP (1) | JPS5722967A (en) |
KR (1) | KR870001172B1 (en) |
AU (1) | AU547767B2 (en) |
BE (1) | BE887036A (en) |
CA (1) | CA1169782A (en) |
DE (1) | DE3100067A1 (en) |
ES (1) | ES498431A0 (en) |
FR (1) | FR2486898B1 (en) |
GB (1) | GB2079691B (en) |
IT (1) | IT1172218B (en) |
NL (1) | NL8100076A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0689985A1 (en) * | 1994-05-31 | 1996-01-03 | Toyoda Koki Kabushiki Kaisha | Power steering apparatus |
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-
1980
- 1980-07-16 JP JP9696780A patent/JPS5722967A/en active Granted
- 1980-12-31 US US06/221,612 patent/US4392540A/en not_active Expired - Lifetime
-
1981
- 1981-01-03 DE DE19813100067 patent/DE3100067A1/en not_active Ceased
- 1981-01-05 AU AU65981/81A patent/AU547767B2/en not_active Ceased
- 1981-01-07 GB GB8100382A patent/GB2079691B/en not_active Expired
- 1981-01-08 KR KR1019810000036A patent/KR870001172B1/en active
- 1981-01-09 ES ES498431A patent/ES498431A0/en active Granted
- 1981-01-09 IT IT67020/81A patent/IT1172218B/en active
- 1981-01-09 CA CA000368226A patent/CA1169782A/en not_active Expired
- 1981-01-09 BE BE0/203457A patent/BE887036A/en not_active IP Right Cessation
- 1981-01-09 NL NL8100076A patent/NL8100076A/en not_active Application Discontinuation
- 1981-01-09 FR FR8100326A patent/FR2486898B1/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0689985A1 (en) * | 1994-05-31 | 1996-01-03 | Toyoda Koki Kabushiki Kaisha | Power steering apparatus |
Also Published As
Publication number | Publication date |
---|---|
US4392540A (en) | 1983-07-12 |
AU547767B2 (en) | 1985-11-07 |
CA1169782A (en) | 1984-06-26 |
GB2079691B (en) | 1984-07-25 |
BE887036A (en) | 1981-05-04 |
JPS5722967A (en) | 1982-02-06 |
GB2079691A (en) | 1982-01-27 |
FR2486898A1 (en) | 1982-01-22 |
KR830004989A (en) | 1983-07-23 |
IT1172218B (en) | 1987-06-18 |
NL8100076A (en) | 1982-02-16 |
DE3100067A1 (en) | 1982-02-11 |
AU6598181A (en) | 1982-01-21 |
ES8300602A1 (en) | 1982-11-01 |
ES498431A0 (en) | 1982-11-01 |
FR2486898B1 (en) | 1986-10-17 |
KR870001172B1 (en) | 1987-06-16 |
IT8167020A0 (en) | 1981-01-09 |
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